| 摘要 |
927,795. Blind riveting. A. DIENER, [trading as ADOLF DIENER APPARATE UND MASCHINENBAU]. Oct. 5, 1959 [Oct. 9, 1958], No. 33703/59. Class 83 (4). A blind-riveting gun comprises a cylinder 2, the piston-rod 3 of which acts as the piston in an hydraulic cylinder 3 and forces fluid into a further cylinder 44 through a port 38. Within the cylinder is a piston 5 which has a piston-rod 65 to which is attached a chuck 4. An extention of the piston-rod runs in a bore 70 in the cover-plate 69 and guides a spring 71. Compressed-air is admitted to the cylinder 2 through a duct 26, by a valve 17, which is biased on to its seat by a spring 18 and is opened by a trigger 13 acting through a hollow push-rod 20. The chuck 4 comprises a body 48 containing a conical member 49 screwed on to a sleeve 51 which is screwed on to the piston-rod 65. Within the member 49 is a pair of chuck jaws 52, a compression member 57 and a spring 56. When the trigger is operated, air is admitted to the cover side of the piston 29 which moves to the left in Fig. 1, forces oil from the cylinder 3 into the cylinder 44 and lifts the piston 5. The piston-rod 65 lifts the conical member 49, the spring 56 holds the jaws' 52 against the nosepiece 62 and the resultant relative movement between the jaws and the conical member clamps the jaws on to the rivet mandrel shank 78. Continued movement of the piston 5 results in deformation of the rivet and fracture of the mandrel at a predetermined point. When the trigger is released the spring 71 returns the pistons to their original positions. |
